* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100vw;
    height: 100vh;
}

#app {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

iframe,
textarea {
    border: 1px solid #000;
    width: 400px;
    height: 300px;
}

iframe {
    margin-top: 16px;
}
